Humans need amino acids to exist. Click on each of the necessary twenty listed to see their molecular structures and learn what type they are.

Here you can learn about biochemistry, the chemistry of the living world. Content explores carbohydrates, lipids, amino acid structure and proteins, enzymes, nucleic acids, and metabolism.

Problem sets, tutorials, and activities related to biochemistry.

Through this activity, students work with macromolecules, proteins and nucleic acids. The focus is on the atomic structure of proteins, how linear polymers are made, and the surface charges of the resulting polymers. . Multiple-choice...

This unit will look at the most common biological molecules. The objective is for you to become familiar with the structures and properties of sugars, lipids, amino acids and nucleotides.

[Free Registration/Login may be required to access all resource tools.] The main chemical components of living organisms are known as organic compounds and are built around the element carbon. Living things are made up of very large...

How much do you know about biological macromolecules?

Understandable lessons about numerous aspects about the composition, function, and interactions of proteins. Each starts with an interactive quiz and links to a tutorial.

This is a good, in-depth reference for the study of macromolecules in biology - lipids, proteins and carbohydrates. Includes images and links to other sources as well as a quiz for students to check understanding.

Two multiple-choice quizzes, one on the processes and types of biological molecules, the other on the structure and replication of DNA.